Abstract: As the starting point of all engineering projects, the bidding work has an important role in the entire production and operation chain, and is closely related to the development of corporate strategic goals and economic benefits. As a key component in the whole process of bidding work, cost estimation work directly affects the bidding price of construction enterprises, is related to whether the bidding work can be carried out smoothly, and plays a vital role in the development of construction enterprises. Therefore, construction companies need to pay attention to cost estimation and integrate it into the actual bidding process. This article discusses the current status and measures of cost estimation in the bidding work of construction companies. The purpose is to improve the success rate of bidding work of construction companies and promote the sustainable development of construction companies themselves.